Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac03f4682e5aa15a…

MALICIOUS

PDF

120.7 KB Created: 2021-03-08 23:03:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1f388559bf8eb7bace343d902c91064 SHA-1: 21552cd29628123d930544fbe5660f6b22e807de SHA-256: ac03f4682e5aa15a6214bd0ec8eddb768b3c43219ed640a93c1dce39232d4842
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL that, when visited, likely leads to a phishing or malware download site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf and includes a keyword related to 'Paradise Lost', indicating a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://midufefew.ru/award?keyword=paradise+lost+short+summary+pdf
    • http://veruvipavopa.getenjoyment.net/numakazogubusotimovujetif.pdf
    • http://veviwumifuvemuz.mypressonline.com/55193794020.pdf
    • http://xevusezes.medianewsonline.com/advantages_of_selective_incapacitation.pdf
    • http://nakotigolajeg.scienceontheweb.net/avent_microwave_steriliser_nz_instructions.pdf
    • http://puveputado.sportsontheweb.net/salefirixo.pdf
    • https://static.s123-cdn-static.com/uploads/4448116/normal_6000db3972f0d.pdf
    • https://zaduguwage.weebly.com/uploads/1/3/0/8/130874015/2175104.pdf
    • https://bukowimulo.weebly.com/uploads/1/3/1/4/131407836/raruromufejiramos.pdf
    • https://cdn-cms.f-static.net/uploads/4454968/normal_5fd9022811e8c.pdf
    • http://nitiwopororotef.mypressonline.com/ross_jeffries_speed_seduction_5.0.pdf
    • http://vugaganopofom.mypressonline.com/how_to_clean_filter_for_hoover_elite_rewind.pdf
    • http://dosaxixapaxa.medianewsonline.com/como_sacar_una_fotografia_digital.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/82b46230-99c4-4918-91d7-3601154af445/how_do_you_say_ethiopia_in_amharic.pdf
    • https://uploads.strikinglycdn.com/files/22f0dad4-a161-49b3-a3de-d0b5c941ec70/texaxos.pdf
    • https://s3.amazonaws.com/mupukesunobaga/lawn_boy_2_stroke_mower_wont_start.pdf
    • https://uploads.strikinglycdn.com/files/e9e5c6ec-d539-4209-a0e9-b0099b4f6e39/nutupitazugusumegon.pdf
    • https://uploads.strikinglycdn.com/files/f6f963ba-1f4c-4cbd-bb61-1a66085f9ce7/international_journal_of_medical_microbiology_and_tropical_diseases_impact_factor.pdf
    • https://s3.amazonaws.com/ziwuvijevo/nikon_versus_canon_cameras.pdf
    • http://belibivizonojo.myartsonline.com/how_to_set_an_armitron_all_sport_watch.pdf
    • https://uploads.strikinglycdn.com/files/29af7d3c-4c3c-4868-91be-a1ec4859b722/engineering_materials_and_manufacturing_processes.pdf
    • https://s3.amazonaws.com/vitelitubovuluj/the_emancipation_proclamation_student_worksheet_answers.pdf
    • https://s3.amazonaws.com/jenagubadopi/90731159996.pdf
    • http://vipuzala.myartsonline.com/81417054326.pdf
    • https://s3.amazonaws.com/fotojipifuzitul/2018_indian_chieftain_limited_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000192ac.bin
c16c08a3d025354ae3020146fcc8bb0b34cbfc1fe495d51f9291bcfc7b88f638		 pdf-font-stream PDF embedded font (sfnt) at offset 0x192AC 5384 bytes
font_01_sfnt_off0001a4d9.bin
94902c109066223cf253ba44cbd80550ae73a4cd3448f8c187d9ab252cbdba3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A4D9 15704 bytes

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